James wood



(No Model.)

' J. WOOD.

Rook-Drilling Machine. No. 228,797. Patenied .lune 15, 880.

any

N.PETERS. P HOTO-LITHOGRAPHER. WASHINGTON. D I:A

UNITED STATES PATENT Ormea.

JAMES WOOD, OF SYRAOUSE, NEW YORK.

ROCK-DRILLING MACHINE.

SPECIFICATION forming part of Letters Patent No. 228,797, dated June 15, 1880.

Application filed May 3, 1880. (No model.)

To all whom it may concern:

Be it known that I, JAMES WOOD, of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful linprovements in Rock Drilling Machines, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates/to that class of drilling-machines which impart to the drilling-tool a reciprocating motion, and are designed to operate chiefly on rock and other analogous material.

The invention consists in a novel construction and combination of the actuating and f feed mechanisms `connected with the drillspindle, as hereinafter fully described, and

speciically set forth in the. claims, whereby the operation of drilling is greatly facilitated and expedited, and the machine rendered perfectly adjustable, according to the tenacity or nature of the material to be drilled.

In the accompanying drawings, Figure lis a front elevation of my invention. Fig. 2 is a vertical transverse section of same 5 Fig. 3, a top view; Fig. 4, a horizontal section on line a: a: in Fig. 2; Fig. 5, a horizontal section on line y y; Fig. 6, an enlarged sectional view of the devices for throwing the feed mechanism out of connection with the drill-spindle; and Fig. 7 is an enlarged inverted plan view of the ratchet-wheel, showing its connection with the drill-spindle.

Similar letters of reference indicate corresponding parts.

R represents a cast-iron vertical frame or pedestal, formed of two side plates strengthened by ribs or flanges on their edges, and united by a cap, h, at the top and by a crossplate, h", near the bottom, and provided with a suitable base, by which it may be bolted to a' plank or other support. The side plates of the aforesaid frame are provided at or near their front edgesv with vertical guides N, on which slides a cross-head, G, said cross-head having through its center a' female threaded aperture, in which works 'a screw-threaded spindleZ 'S, provided at its lower extremity with a socket, L', for the reception of the shank of the drill, (designated by the letter Q in the drawings.)

A lever, F, is pivoted to the frame R hack of the cross-head, and engages the latter with one'end, and has its opposite end in the path of cams H H, fixed to a shaft extended across the rear side of the frame R, said shaft being" journaled in boxes attached to said frame and provided with a balance-wheel, J, and with a crank or other suitable driving device. The rotation ofthe aforesaid shaft causes its cams H H to consecutively depress the rear end of the lever'F, and thus elevate, by the forward end of same, the drill-spindle S.

A spiral spring, T, surrounding the drillspindle, hears at one end on the cross-head Gr, and at the opposite end against a plate, U, which is adjustably supported underneath the cap h of the frame by means of set-screws E E, inserted through the aforesaid cap. The spring T exerts a downward pressure on vthe cross-head, and thus, during the intermissions of the engagements of the cams HH with the lever F, imparts a downward thrust to the drill-spindle.

The drill-spindle is provided with a longitudinal groove, ci, and slides longitudinally through an eye in the axis of a ratchet-wheel, A, mounted on top of the cap h of the frame R, said ratchet-wheel having its hub extended through and journaled in said cap.

A lug or feather,'b, is inserted into a dovetail groove in the hub of the ratchet-wheel A, and enters the groove a'of the drill-spindle. An annular plate bolted to the lower end of the hub, and engaging the under side of the cap h, serves to retain the feather b in its position and prevents the ratchet-wheel from being raised off the cap h. A

B denotes a pawlin the form of a bar, having a hinge-joint, c, and sliding at one end in a box on top of the cap h. The other end of the pawl has ratchet-teeth engaging the ratchet-wheel A, and projects, with a deiiection or taper, beyond the same, as shown at f. A spring, g, bearing against the latter part of the pawl B, serves to yieldi'ngiy maintain the same engaged with the ratchet-wheel. The pawl B receives a reciprocating motion by a bell-crank lever, G., one arm of which engages that part of the pawl which slides in a box, as before described, the other arm of the lever O being l'OO connected with the lever F by a link, L, which transmits the oscillating motion of the latter lever to the former. To render the stroke of the pawl adjustable the bell-crank lever O is provided with a slot, n, in which the end of the link L can be connected at a greater or less distance from the fulcrum of said lever.

Between the tapered end f of the pawl and the ratchet-wheel projects a pin, k, attached to a block7 sf, which slides in a transverse direc tion underneath the pawl, and is held adjustably in its position by a set-screw, o, inserted through the side of the frame, as best seen in Fig. 6 of the drawings. By means of said setscrew the pin 7c can be set in such position in relation to the pawl B as to cause the latter to collide with the former, and thereby be thrown out vof connection with the ratchetwheel at any desired length of its stroke. Thus the position of the pin 7c determines themotion ofthe ratchet-wheel A, and the latter, by the engagement of its feather b with the groove a in the drill-spindle, turns said spindle at the same ratio, and causes the same to be fed downward by its threaded exterior working in the female threaded cross-head G, as before described. Whenever the drill-spindle has been fed outits fulllength, and is required to be retracted, the pin la can be set so as to retain the pawl entirely disconnected from the ratchetwheel, thereby allowing the drill-spindle to be turned in a reverse direction, which latteroperation may be expeditiously accomplished by applying a wrench to the square head on the upper extremity of the spindle.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The combination of the screw-threaded spindle S, provided with the groove a, the femalethreaded cross-head G, lever F, link L, bell-crank C, pawl B, and the ratchet-wheel A, provided with the feather b, substantially in the manner described and set forth.

2. In combination with the screw-threaded spindle S, provided with slot a, and the ratchet-wheel A, provided with the feather b, the pawl B, having the joint e and the tapered extremity j', the spring g, and adjustable pin 7c, substantially in the manner described and shown.

3. In combination with the screw-threaded spindle S, provided with groove et, and ratchet-wheel A, provided with feather b, thej'ointed pawl B, having the deflected or tapered end f, and the pin 7c, adjustedfby set-screwv, substantially as shown and set forth.

4. In a drilli1'1g-machine,the combination of the following elements, viz: the frame or pedestal R, provided with cap h and guides N, the screw-threaded spindle S, provided with groove a and socket fi, the female-threaded cross head G, spring T, plate U, set screw E, lever F, cams H H, balance -wheel J, link L, bell-crank lever O, pawl B, spring g, adjustable pin lc, and the ratchet-wheel A, provided with feather b, allA constructed and arranged to operate substantially in the manner shown and set forth.

Intestimony whereof I have hereunto signed my name and affixed my seal in the presence of two attesting witnesses, at Syracuse, in the county of Onondaga and State of New York, this 26th day of April, 1880.

JAMES WOOD. [L

Witnesses:

E. LAAss, F. H. LIVINGSTON. 

